Player served three-month suspension over positive test
Umberto Ferrara blamed incident on physiotherapist
The Wimbledon men’s singles champion Jannik Sinner has reappointed his former fitness coach Umberto Ferrara with immediate effect, the Italian world No 1 confirmed on Wednesday.
Sinner parted ways with Ferrara and physiotherapist Giacomo Naldi last year following the investigation into his positive tests for banned substance clostebol.
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